Question

What is the maximum sulfur emissions in tons/day of sulfur dioxide that can be released in the LA air basin and not exceed the California Ambient 24 hr average Air Quality Standard (for this problem, assume area of 4000 km2 and 500 m mixing height, average wind velocity west to east of 1 m/s, Temp 298 K, Pground level = 1 atm, air residence time 3 days) —assume all pollutants trapped in this range. Be sure to note that pressure changes with altitude, please be sure that error in pressure used is no more than 5% for problem.

Answer 1

site: http://www.fraqmd.org/Outdated/aaqs.htm (California Ambient 24 hr average Air Quality Standard)

Values:

Standar SO₂ emssion per day: 0.04 ppm/day

Volume: Area x height = 4000 km²x0.5km=2000 km³ or (2x10¹² m³) or (2x10¹⁵ L)

Aire velocity: 1 m/s

Time: 3 days or (72 hrs) or (4320 mins) or (259200 seg)

Mol of SO₂:

SO₂ molecular weight: 64 g/mol

Mass of SO₂:

or (2.36x10⁵ mg) or (2.36x10⁸ mcg)

Process:

Mass of SO₂:

Rate per day:

Rate for standar comparation:

Standar Value:

Experimental value: